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	Prefix	Description
	128.220.0.0/16	Johns Hopkins University
	162.129.0.0/16	The Johns Hopkins Medical Institutions
	192.12.13.0/24	Johns Hopkins University
	192.12.14.0/24	Johns Hopkins University
	198.57.32.0/21	Johns Hopkins All Children's Hospital, Inc.
	198.57.39.0/24	Johns Hopkins All Children's Hospital, Inc.
	198.57.40.0/22	Johns Hopkins All Children's Hospital, Inc.
	204.124.184.0/22	Johns Hopkins All Children's Hospital, Inc.
	2606:2b00::/32	Johns Hopkins University

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications, LLC	✔	✘
	AS6939	Hurricane Electric LLC	✔	✔
	AS3356	Lumen (Level 3)	✔	✘
	AS11096	FloridaNet	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS6939	Hurricane Electric LLC	✔	✔
	AS11096	FloridaNet	✔	✘
	AS174	Cogent Communications, LLC	✔	✘
	AS3356	Lumen (Level 3)	✔	✘
	AS10886	University of Maryland	✔	✔
	AS77	Johns Hopkins University Applied Physics Laboratory	✔	✘

ASHandle:       AS5723
OrgID:          JHU-Z
ASName:         JHU
ASNumber:       5723
RegDate:        1995-09-06
Updated:        2020-09-08
Source:         ARIN



OrgID:          JHU-Z
OrgName:        Johns Hopkins University
CanAllocate:    
Street:         Hopkins Information Technology Services
Street:         3400 North Charles Street
Street:         Garland Hall, Suite 020
City:           Baltimore
State/Prov:     MD
Country:        US
PostalCode:     21218
RegDate:        2020-08-28
Updated:        2020-08-28
OrgAdminHandle: DZ24-ARIN
OrgTechHandle:  DZ24-ARIN
OrgAbuseHandle: DZ24-ARIN
Source:         ARIN





OrgAdminHandle:       DZ24-ARIN
OrgAdminName:          Network Operation Center
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        DZ24-ARIN
OrgTechName:           Network Operation Center
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       DZ24-ARIN
OrgAbuseName:          Network Operation Center
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-05-07T03:36:21Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RADB	as-hurricane	24736
RADB	as-hurricanev6	20830
ARIN	as5723:as-5723-all	2
RADB	as11096:as-flrnet-members	56
RIPE	as-transroute-spec	19626
LEVEL3	as-lumen-customers-asns	10695
ARIN	as-zenedge	2421
RADB	as198949:as-sd	3446
RADB	as-flrnet-aggregate	105